/ Dictionary / Index S sickening: Meaning and Definition of Find definitions for: sick•en•ing Pronunciation: (sik'u-ning), [key] — adj. causing or capable of causing sickness, esp. nausea, disgust, or loathing: sickening arrogance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sickening (Thesaurus) sickener sicker Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language